KR0125910Y1 - Scsi host adapter of a computer - Google Patents

Abstract

The present invention relates to a SCSI main application device of a computer, and the SCSI input / output device of a conventional computer uses an I / O board and a SCSI controller when using SCSI peripheral devices (Disk CT, MT, ODD). You have to interface.

That is, since the dual bus structure is used, there is a problem of double cost and performance deterioration, and a problem of deterioration of reliability in data exchange.

In order to solve this problem, the present invention uses a SCSI host adapter device on the Tycom computer to connect directly to the system bus, and it operates at a high speed and does not use a SCSI controller. The low cost and the reliability of data exchange can be improved.

Description

Applicable device of computer

1 is a configuration diagram of the SSI input and output device of a conventional computer

2 is a configuration diagram of the main application device of SSC of the present invention computer

FIG. 3 is a block diagram of the main application part of SSI in FIG.

* Explanation of symbols for main parts of the drawings

1: C u board 2: Memory board

3: I / O controller 4: SCSI controller

5: Peripheral Device 6: System Control Module

7: SCSI main application part 7A: System bus interface module

7B: MPU / Peripheral Module 7C: SCSI Bus Interface Module

7D: Data buffer RAM module

The present invention relates to the SCSI Hot Adapter (SHA) of the computer, especially when using a peripheral device on the CPU board of the Tycom computer using the SCSI bus to improve the data reliability of the computer It is about a CS application device.

1 is a configuration diagram of the main application device of SSI of a conventional computer.

The conventional SC eye input / output device includes a CPI board 1 for outputting command data, as shown in FIG. A memory board (2) for storing the result of processing according to the command data of the CPU board (1); An input / output control unit 3 for controlling input and output; A SCSI controller (4) for controlling data so that input / output of the input / output controller (3) is suitable for a Versa Module Europe (VME) bus and a SCSI bus; A peripheral unit 5 driven according to the command data of the CPU board 1; It consists of a system control module 6 for controlling the operation of the CPU board (1), the memory board (2), the input / output control unit (3) for normal operation.

The operation will be described below.

First, when trying to read the data of the disk 5A of the peripheral unit 5, the CPU board 1 sends command data to the input / output control unit 3 using a protocol suitable for the system bus. Type in

The input / output controller 3 inputs the command data of the CPU board 1 to the SCSI controller 4 through the VME bus, and the SCSI controller 4 inputs the command data to the peripheral device 5 through the SCSI bus. 5A is driven.

The SCSI controller 4 inputs the data of the driven disk 5A to the input / output controller 3 through the VME bus, and the input / output controller 3 receives the system bus interface module according to the command data of the CPU board 1. The data of 7A is input to the memory board 2 through the system bus and stored.

The system control module 6 controls the respective parts to perform the same operation as above.

On the other hand, in the same operation as above, the data stored in the memory board 2 can be recorded on the disk 5A of the peripheral portion 5 according to the command data of the CPU board 1, as well as other MT (Magnetic). TAPE) 5B, CT (Cartridge TAPE) 5C, and ODD (Optical Disk Drive) 5D can be driven to record and read data.

The problem with the prior art is that when using peripheral devices (disk, MT, CT, ODD) in the CPI board, information must be exchanged through the I / O control unit and the SCSI control unit, and the system bus and the VME bus are doubled. By using the bus structure, performance is reduced, costs are high, and data reliability is deteriorated.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide an SCS I main application device of a computer that can improve data reliability by using only the SCSI bus when using peripheral devices in the CPU board.

The main application device of the CS eye of the present invention according to the above object, as shown in Figure 2, the CPI board (1) for outputting command data; A memory board (2) for storing a processing result of the command data of the CPU board (1); An input / output control unit 3 for controlling data input / output; A SCSI controller (4) for converting the input / output of the input / output controller (3) to fit the VME bus; A SCSI main application unit (7) for controlling data transfer between the CPU board (1) and the peripheral unit (5); It is composed of a system control module 6 for controlling the parts for normal operation.

3 is a block diagram of the main SCSI unit 7, a system bus interface module 7A for interfacing the command data of the CPU board 1 and a command interfaced by the system bus interface module 7A. A SCSI bus that drives the peripheral unit 5 according to the MPU / microcircuit module 7B for transmitting data and the peripheral device 5 according to the command data transmitted by the MPU / circuit circuit module 7B. It consists of an interface module 7C and a data buffer ram module 7D that temporarily stores data interfaced by the SCSI bus interface module 7C and transfers data to the MPU / peripheral circuit module 7B upon request. do.

Hereinafter, the operation will be described in detail.

First, when the CPI board 1 tries to read data on the disk 5A, MT 5B, CT 5C, ODD 5D, etc. of the peripheral unit 5, the CPI board 1 is a system bus. The command data is inputted into the SCSI main application section 7 through.

Data input to the SCSI main application unit 7 is transferred to the data transfer bus interface 7A-1, the interrupt bus interface 7A-2, the arbitration bus interface 7A-3 and the utility bus of the system bus interface module 7A. It is input to the MPU 7B-1 of the MPU / peripheral circuit module 7B via the interface 7A-4.

The data transmission bus interface 7A-1 receives the data transfer request and transmits the result processed by the MPU / peripheral circuit module 7B, and informs the MPU 7B-1 of the interrupt bus interface ( 7A-2) is used as a communication path when the system has an emergency situation such as a power failure or when troubleshooting is performed, and the arbitration bus interface (7A-3) prevents a collision when trying to transmit several data at the same time. In addition, the utility bus interface 7A-4 is used to match signals for performing each function.

The MPU 7B-1 interprets the command data output from the CPI board 1 of FIG. 1 and uses the SCSI bus interface module 7C as a disk (5A), CT (5B), MT (5C), and ODD (5D). Command to read.

Therefore, the SCSI bus interface module 7C reads the data requested by the CPU board 1 from the peripheral unit 5 using a protocol suitable for the SCSI bus, and inputs the data into the data buffer ram module 7D. The data buffer ram module 7D temporarily stores the received data in the data buffer ram 7D-2 through the buffer 7D-1.

Then, if the data buffer RAM module 7D authorizes the data to be stored to the MPU 7B-1, the MPU 7B-1 informs the CPU board 1 that it can transmit the requested data. If the CPI board 1 receives a request notification, the request data stored in the data buffer RAM 7D-2 is converted into a system bus and transmitted to the memory board 2 of FIG. 2 through the system bus interface module 7A. .

After the transfer is completed, the data transfer bus interface 7A-1 inputs the transfer completion signal of the MPU / peripheral circuit module 7B to the MPU 7B-1.

On the other hand, in the ROM and RAM of the local memory 7B-2 of the MPU / peripheral circuit module 7B, programs for performing various functions are stored, and the address encoders 7B-3 are required. Signal is generated, the interrupt priority encoders 7B-4 perform interrupts according to priorities when various interrupts occur, and the registers 7B-5 not only control data information, but also recognize information, and generate a clock generator 7B. -6 generates a clock for system execution, the reset circuit 7B-7 generates a reset signal, the watchdog timer 7B-8 generates an alarm sound when a program malfunctions, and the timer 7B- 9) shows the time when the interrupt generation cycle changes.

Meanwhile, the operations of the input / output control unit 3, the SCSI control unit 4, and the system control module 6 in FIG. 2 are the same as in the prior art.

As described above, the present invention uses a SCSI main application device to drive peripherals through the SCSI bus, so that only the SCSI bus can be used to improve data reliability and can be directly connected to the system bus. It works.

Claims (2)

A CPI board 1 for outputting command data; A memory board (2) for storing a processing result of the command data of the CPU board (1); An input / output controller (3) for controlling input / output according to the command data of the CPU board (1), a SCSI controller (4) for converting the input / output of the input / output controller (3) to a VME bus, and the CPU board (1) The system control module receives the command data of the peripheral unit 5 to drive the data processing, and the SCSI main application unit 7 for interfacing the processing result to the CPU board 1 and the control unit for normal operation. (6), the main application device of SCS eye of a computer. The SCSI main application unit (7) according to claim 1, further comprising: a system bus interface module (7A) for interfacing the command data of the CPU board (1) and command data interfaced by the system bus interface module (7A). A SCSI bus interface module 7C which drives the peripheral unit 5 according to the command data transmitted by the MPU / peripheral circuit module 7B for transmitting and the command data transmitted by the MPU / peripheral circuit module 7B, and interfaces the data; A data buffer RAM module 7D for temporarily storing data interfaced by the SCSI bus interface module 7C and transmitting data to the MPU / peripheral circuit module 7B upon request. CSI application device.